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Heat Transfer
Any help will be appreciated,
In an experiment to determine the rate at which heat is extracted from a hot material, 305 g of the material at 90 °C is put into a 50 mm diameter copper vessel to a depth of 90 mm as shown below. The hot material and calorimeter are placed in a container holding 189 g of cold water at 22.7 °C. The temperature of the water is then measured every 30 seconds for 3minutes. The average temperature rise per second is calculated as 0.0065 ± 0.0005 °C/sec. From the data provided, determine the average heat power ( in kW ) transferred to the water. 
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